Setting NLS_LANG for a client with multiple Oracle servers

Hello!

We have a web application that needs to connect to a Oracle servers with different charactersets. When the NLS_LANG on the client is a single-byte encoding and the server has a single byte encoding there is no problem. We now have a server with NLS_CHARACTERSET UTF8 and all special characters (accented Hungarians) are replaced.
When we put the customer UTF8 the rest of the servers does not work.
What is the solution for a client and several servers with a different encoding?
Is there a special touch to the connection string?
I tried to change the nls_lang with a statement of alter session but without success.

Kind regards
emeriqus

NLS_LANG does not depend on the database side, it is a CLIENT of setting to 'make Oracle know what encoding is used on the CLIENT' so that Oracle can perform the conversion of the encoding to the encoding of the data base (NLS_CHARACTERSET) of the customer.

for AN application/client is only a correct value of NLS_LANG, independently of the NLS_CHARACTERSET database

If you web application is really a UTF8 application (check with your provider) so you can perfectly use a client UTF8 and a database of 8 bits
Of course, you will be limited on the side of the database in this case given the 8-bit character set knows not all of the characters in UTF8

The fact that affecting the NLS_LANG UTF8 "does not work" with your web app is simply the fact that your application is not a UTF8 env.
Setting nls_lang UTF8 will not "magically" your app UTF8, NLS_LANG is a function of the encoding used on the web server.

But the first thing you should ask yourself is so common is correctly in the Oracle database.

SQLdeveloper allows to check the data, it is a "good customer know" who needs no NLS configuration.
You can download it from http://www.oracle.com/technology/products/database/sql_developer/
If the data is displayed correctly in SQLdeveloper, then you are sure that it is correct in the database.

If data are WRONG in the database that must be corrected in the first place, 'try' other client side of configurations will only make matter worse (even if they make the data "look good")

Kind regards
Gunther

Client-side mentalink notes:

Note: 158577.1> NLS_LANG explained (how work of transformation of characters Client / Server)?
1.2 what is this NLS_LANG thing?
3.2 an example detailed installation of nls hard to understand what is happening.
4.2 How to check parameter NLS_LANG to the customer?
5.1 my windows sqlplus is not displayed all my extended characters.
Note: 179133.1> the correct NLS_LANG in a Windows environment
Note: 264157.1> the correct setting of the NLS_LANG in the Unix environments
Note: 229786.1> NLS_LANG and servers Web explained.
Note 115001.1> parameter NLS_LANG to the Client and JDBC drivers

If you are using Unicode beginning here:
Note: 788156.1> AL32UTF8 / UTF8 (Unicode) Character Set Implications database

Setting NLs parameters: Note: 241047.1> the priority of NLS parameters explained.

Tags: Database

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